# frozen_string_literal: true
begin
require 'rbconfig'
rescue LoadError
# for make mjit-headers
end
# Namespace for file utility methods for copying, moving, removing, etc.
#
# == What's Here
#
# First, what’s elsewhere. \Module \FileUtils:
#
# - Inherits from {class Object}[https://docs.ruby-lang.org/en/master/Object.html].
# - Supplements {class File}[https://docs.ruby-lang.org/en/master/File.html]
# (but is not included or extended there).
#
# Here, module \FileUtils provides methods that are useful for:
#
# - {Creating}[rdoc-ref:FileUtils@Creating].
# - {Deleting}[rdoc-ref:FileUtils@Deleting].
# - {Querying}[rdoc-ref:FileUtils@Querying].
# - {Setting}[rdoc-ref:FileUtils@Setting].
# - {Comparing}[rdoc-ref:FileUtils@Comparing].
# - {Copying}[rdoc-ref:FileUtils@Copying].
# - {Moving}[rdoc-ref:FileUtils@Moving].
# - {Options}[rdoc-ref:FileUtils@Options].
#
# === Creating
#
# - ::mkdir: Creates directories.
# - ::mkdir_p, ::makedirs, ::mkpath: Creates directories,
# also creating ancestor directories as needed.
# - ::link_entry: Creates a hard link.
# - ::ln, ::link: Creates hard links.
# - ::ln_s, ::symlink: Creates symbolic links.
# - ::ln_sf: Creates symbolic links, overwriting if necessary.
#
# === Deleting
#
# - ::remove_dir: Removes a directory and its descendants.
# - ::remove_entry: Removes an entry, including its descendants if it is a directory.
# - ::remove_entry_secure: Like ::remove_entry, but removes securely.
# - ::remove_file: Removes a file entry.
# - ::rm, ::remove: Removes entries.
# - ::rm_f, ::safe_unlink: Like ::rm, but removes forcibly.
# - ::rm_r: Removes entries and their descendants.
# - ::rm_rf, ::rmtree: Like ::rm_r, but removes forcibly.
# - ::rmdir: Removes directories.
#
# === Querying
#
# - ::pwd, ::getwd: Returns the path to the working directory.
# - ::uptodate?: Returns whether a given entry is newer than given other entries.
#
# === Setting
#
# - ::cd, ::chdir: Sets the working directory.
# - ::chmod: Sets permissions for an entry.
# - ::chmod_R: Sets permissions for an entry and its descendants.
# - ::chown: Sets the owner and group for entries.
# - ::chown_R: Sets the owner and group for entries and their descendants.
# - ::touch: Sets modification and access times for entries,
# creating if necessary.
#
# === Comparing
#
# - ::compare_file, ::cmp, ::identical?: Returns whether two entries are identical.
# - ::compare_stream: Returns whether two streams are identical.
#
# === Copying
#
# - ::copy_entry: Recursively copies an entry.
# - ::copy_file: Copies an entry.
# - ::copy_stream: Copies a stream.
# - ::cp, ::copy: Copies files.
# - ::cp_lr: Recursively creates hard links.
# - ::cp_r: Recursively copies files, retaining mode, owner, and group.
# - ::install: Recursively copies files, optionally setting mode,
# owner, and group.
#
# === Moving
#
# - ::mv, ::move: Moves entries.
#
# === Options
#
# - ::collect_method: Returns the names of methods that accept a given option.
# - ::commands: Returns the names of methods that accept options.
# - ::have_option?: Returns whether a given method accepts a given option.
# - ::options: Returns all option names.
# - ::options_of: Returns the names of the options for a given method.
#
# == Path Arguments
#
# Some methods in \FileUtils accept _path_ arguments,
# which are interpreted as paths to filesystem entries:
#
# - If the argument is a string, that value is the path.
# - If the argument has method +:to_path+, it is converted via that method.
# - If the argument has method +:to_str+, it is converted via that method.
#
# == About the Examples
#
# Some examples here involve trees of file entries.
# For these, we sometimes display trees using the
# {tree command-line utility}[https://en.wikipedia.org/wiki/Tree_(command)],
# which is a recursive directory-listing utility that produces
# a depth-indented listing of files and directories.
#
# We use a helper method to launch the command and control the format:
#
# def tree(dirpath = '.')
# command = "tree --noreport --charset=ascii #{dirpath}"
# system(command)
# end
#
# To illustrate:
#
# tree('src0')
# # => src0
# # |-- sub0
# # | |-- src0.txt
# # | `-- src1.txt
# # `-- sub1
# # |-- src2.txt
# # `-- src3.txt
#
# == Avoiding the TOCTTOU Vulnerability
#
# For certain methods that recursively remove entries,
# there is a potential vulnerability called the
# {Time-of-check to time-of-use}[https://en.wikipedia.org/wiki/Time-of-check_to_time-of-use],
# or TOCTTOU, vulnerability that can exist when:
#
# - An ancestor directory of the entry at the target path is world writable;
# such directories include /tmp.
# - The directory tree at the target path includes:
#
# - A world-writable descendant directory.
# - A symbolic link.
#
# To avoid that vulnerability, you can use this method to remove entries:
#
# - FileUtils.remove_entry_secure: removes recursively
# if the target path points to a directory.
#
# Also available are these methods,
# each of which calls \FileUtils.remove_entry_secure:
#
# - FileUtils.rm_r with keyword argument secure: true.
# - FileUtils.rm_rf with keyword argument secure: true.
#
# Finally, this method for moving entries calls \FileUtils.remove_entry_secure
# if the source and destination are on different file systems
# (which means that the "move" is really a copy and remove):
#
# - FileUtils.mv with keyword argument secure: true.
#
# \Method \FileUtils.remove_entry_secure removes securely
# by applying a special pre-process:
#
# - If the target path points to a directory, this method uses methods
# {File#chown}[https://docs.ruby-lang.org/en/master/File.html#method-i-chown]
# and {File#chmod}[https://docs.ruby-lang.org/en/master/File.html#method-i-chmod]
# in removing directories.
# - The owner of the target directory should be either the current process
# or the super user (root).
#
# WARNING: You must ensure that *ALL* parent directories cannot be
# moved by other untrusted users. For example, parent directories
# should not be owned by untrusted users, and should not be world
# writable except when the sticky bit is set.
#
# For details of this security vulnerability, see Perl cases:
#
# - {CVE-2005-0448}[https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0448].
# - {CVE-2004-0452}[https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0452].
#
module FileUtils
VERSION = "1.6.0"
def self.private_module_function(name) #:nodoc:
module_function name
private_class_method name
end
#
# Returns a string containing the path to the current directory:
#
# FileUtils.pwd # => "/rdoc/fileutils"
#
# FileUtils.getwd is an alias for FileUtils.pwd.
#
# Related: FileUtils.cd.
#
def pwd
Dir.pwd
end
module_function :pwd
alias getwd pwd
module_function :getwd
# Changes the working directory to the given +dir+, which
# should be {interpretable as a path}[rdoc-ref:FileUtils@Path+Arguments]:
#
# With no block given,
# changes the current directory to the directory at +dir+; returns zero:
#
# FileUtils.pwd # => "/rdoc/fileutils"
# FileUtils.cd('..')
# FileUtils.pwd # => "/rdoc"
# FileUtils.cd('fileutils')
#
# With a block given, changes the current directory to the directory
# at +dir+, calls the block with argument +dir+,
# and restores the original current directory; returns the block's value:
#
# FileUtils.pwd # => "/rdoc/fileutils"
# FileUtils.cd('..') { |arg| [arg, FileUtils.pwd] } # => ["..", "/rdoc"]
# FileUtils.pwd # => "/rdoc/fileutils"
#
# Keyword arguments:
#
# - verbose: true - prints an equivalent command:
#
# FileUtils.cd('..')
# FileUtils.cd('fileutils')
#
# Output:
#
# cd ..
# cd fileutils
#
# FileUtils.chdir is an alias for FileUtils.cd.
#
# Related: FileUtils.pwd.
#
def cd(dir, verbose: nil, &block) # :yield: dir
fu_output_message "cd #{dir}" if verbose
result = Dir.chdir(dir, &block)
fu_output_message 'cd -' if verbose and block
result
end
module_function :cd
alias chdir cd
module_function :chdir
#
# Returns +true+ if the file at path +new+
# is newer than all the files at paths in array +old_list+;
# +false+ otherwise.
#
# Argument +new+ and the elements of +old_list+
# should be {interpretable as paths}[rdoc-ref:FileUtils@Path+Arguments]:
#
# FileUtils.uptodate?('Rakefile', ['Gemfile', 'README.md']) # => true
# FileUtils.uptodate?('Gemfile', ['Rakefile', 'README.md']) # => false
#
# A non-existent file is considered to be infinitely old.
#
# Related: FileUtils.touch.
#
def uptodate?(new, old_list)
return false unless File.exist?(new)
new_time = File.mtime(new)
old_list.each do |old|
if File.exist?(old)
return false unless new_time > File.mtime(old)
end
end
true
end
module_function :uptodate?
def remove_trailing_slash(dir) #:nodoc:
dir == '/' ? dir : dir.chomp(?/)
end
private_module_function :remove_trailing_slash
#
# Creates directories at the paths in the given +list+
# (a single path or an array of paths);
# returns +list+ if it is an array, [list] otherwise.
#
# Argument +list+ or its elements
# should be {interpretable as paths}[rdoc-ref:FileUtils@Path+Arguments].
#
# With no keyword arguments, creates a directory at each +path+ in +list+
# by calling: Dir.mkdir(path, mode);
# see {Dir.mkdir}[https://docs.ruby-lang.org/en/master/Dir.html#method-c-mkdir]:
#
# FileUtils.mkdir(%w[tmp0 tmp1]) # => ["tmp0", "tmp1"]
# FileUtils.mkdir('tmp4') # => ["tmp4"]
#
# Keyword arguments:
#
# - mode: mode - also calls File.chmod(mode, path);
# see {File.chmod}[https://docs.ruby-lang.org/en/master/File.html#method-c-chmod].
# - noop: true - does not create directories.
# - verbose: true - prints an equivalent command:
#
# FileUtils.mkdir(%w[tmp0 tmp1], verbose: true)
# FileUtils.mkdir(%w[tmp2 tmp3], mode: 0700, verbose: true)
#
# Output:
#
# mkdir tmp0 tmp1
# mkdir -m 700 tmp2 tmp3
#
# Raises an exception if any path points to an existing
# file or directory, or if for any reason a directory cannot be created.
#
# Related: FileUtils.mkdir_p.
#
def mkdir(list, mode: nil, noop: nil, verbose: nil)
list = fu_list(list)
fu_output_message "mkdir #{mode ? ('-m %03o ' % mode) : ''}#{list.join ' '}" if verbose
return if noop
list.each do |dir|
fu_mkdir dir, mode
end
end
module_function :mkdir
#
# Creates directories at the paths in the given +list+
# (a single path or an array of paths),
# also creating ancestor directories as needed;
# returns +list+ if it is an array, [list] otherwise.
#
# Argument +list+ or its elements
# should be {interpretable as paths}[rdoc-ref:FileUtils@Path+Arguments].
#
# With no keyword arguments, creates a directory at each +path+ in +list+,
# along with any needed ancestor directories,
# by calling: Dir.mkdir(path, mode);
# see {Dir.mkdir}[https://docs.ruby-lang.org/en/master/Dir.html#method-c-mkdir]:
#
# FileUtils.mkdir_p(%w[tmp0/tmp1 tmp2/tmp3]) # => ["tmp0/tmp1", "tmp2/tmp3"]
# FileUtils.mkdir_p('tmp4/tmp5') # => ["tmp4/tmp5"]
#
# Keyword arguments:
#
# - mode: mode - also calls File.chmod(mode, path);
# see {File.chmod}[https://docs.ruby-lang.org/en/master/File.html#method-c-chmod].
# - noop: true - does not create directories.
# - verbose: true - prints an equivalent command:
#
# FileUtils.mkdir_p(%w[tmp0 tmp1], verbose: true)
# FileUtils.mkdir_p(%w[tmp2 tmp3], mode: 0700, verbose: true)
#
# Output:
#
# mkdir -p tmp0 tmp1
# mkdir -p -m 700 tmp2 tmp3
#
# Raises an exception if for any reason a directory cannot be created.
#
# FileUtils.mkpath and FileUtils.makedirs are aliases for FileUtils.mkdir_p.
#
# Related: FileUtils.mkdir.
#
def mkdir_p(list, mode: nil, noop: nil, verbose: nil)
list = fu_list(list)
fu_output_message "mkdir -p #{mode ? ('-m %03o ' % mode) : ''}#{list.join ' '}" if verbose
return *list if noop
list.each do |item|
path = remove_trailing_slash(item)
stack = []
until File.directory?(path) || File.dirname(path) == path
stack.push path
path = File.dirname(path)
end
stack.reverse_each do |dir|
begin
fu_mkdir dir, mode
rescue SystemCallError
raise unless File.directory?(dir)
end
end
end
return *list
end
module_function :mkdir_p
alias mkpath mkdir_p
alias makedirs mkdir_p
module_function :mkpath
module_function :makedirs
def fu_mkdir(path, mode) #:nodoc:
path = remove_trailing_slash(path)
if mode
Dir.mkdir path, mode
File.chmod mode, path
else
Dir.mkdir path
end
end
private_module_function :fu_mkdir
#
# Removes directories at the paths in the given +list+
# (a single path or an array of paths);
# returns +list+, if it is an array, [list] otherwise.
#
# Argument +list+ or its elements
# should be {interpretable as paths}[rdoc-ref:FileUtils@Path+Arguments].
#
# With no keyword arguments, removes the directory at each +path+ in +list+,
# by calling: Dir.rmdir(path);
# see {Dir.rmdir}[https://docs.ruby-lang.org/en/master/Dir.html#method-c-rmdir]:
#
# FileUtils.rmdir(%w[tmp0/tmp1 tmp2/tmp3]) # => ["tmp0/tmp1", "tmp2/tmp3"]
# FileUtils.rmdir('tmp4/tmp5') # => ["tmp4/tmp5"]
#
# Keyword arguments:
#
# - parents: true - removes successive ancestor directories
# if empty.
# - noop: true - does not remove directories.
# - verbose: true - prints an equivalent command:
#
# FileUtils.rmdir(%w[tmp0/tmp1 tmp2/tmp3], parents: true, verbose: true)
# FileUtils.rmdir('tmp4/tmp5', parents: true, verbose: true)
#
# Output:
#
# rmdir -p tmp0/tmp1 tmp2/tmp3
# rmdir -p tmp4/tmp5
#
# Raises an exception if a directory does not exist
# or if for any reason a directory cannot be removed.
#
# Related: {methods for deleting}[rdoc-ref:FileUtils@Deleting].
#
def rmdir(list, parents: nil, noop: nil, verbose: nil)
list = fu_list(list)
fu_output_message "rmdir #{parents ? '-p ' : ''}#{list.join ' '}" if verbose
return if noop
list.each do |dir|
Dir.rmdir(dir = remove_trailing_slash(dir))
if parents
begin
until (parent = File.dirname(dir)) == '.' or parent == dir
dir = parent
Dir.rmdir(dir)
end
rescue Errno::ENOTEMPTY, Errno::EEXIST, Errno::ENOENT
end
end
end
end
module_function :rmdir
# Creates {hard links}[https://en.wikipedia.org/wiki/Hard_link].
#
# Arguments +src+ (a single path or an array of paths)
# and +dest+ (a single path)
# should be {interpretable as paths}[rdoc-ref:FileUtils@Path+Arguments].
#
# When +src+ is the path to an existing file
# and +dest+ is the path to a non-existent file,
# creates a hard link at +dest+ pointing to +src+; returns zero:
#
# Dir.children('tmp0/') # => ["t.txt"]
# Dir.children('tmp1/') # => []
# FileUtils.ln('tmp0/t.txt', 'tmp1/t.lnk') # => 0
# Dir.children('tmp1/') # => ["t.lnk"]
#
# When +src+ is the path to an existing file
# and +dest+ is the path to an existing directory,
# creates a hard link at dest/src pointing to +src+; returns zero:
#
# Dir.children('tmp2') # => ["t.dat"]
# Dir.children('tmp3') # => []
# FileUtils.ln('tmp2/t.dat', 'tmp3') # => 0
# Dir.children('tmp3') # => ["t.dat"]
#
# When +src+ is an array of paths to existing files
# and +dest+ is the path to an existing directory,
# then for each path +target+ in +src+,
# creates a hard link at dest/target pointing to +target+;
# returns +src+:
#
# Dir.children('tmp4/') # => []
# FileUtils.ln(['tmp0/t.txt', 'tmp2/t.dat'], 'tmp4/') # => ["tmp0/t.txt", "tmp2/t.dat"]
# Dir.children('tmp4/') # => ["t.dat", "t.txt"]
#
# Keyword arguments:
#
# - force: true - overwrites +dest+ if it exists.
# - noop: true - does not create links.
# - verbose: true - prints an equivalent command:
#
# FileUtils.ln('tmp0/t.txt', 'tmp1/t.lnk', verbose: true)
# FileUtils.ln('tmp2/t.dat', 'tmp3', verbose: true)
# FileUtils.ln(['tmp0/t.txt', 'tmp2/t.dat'], 'tmp4/', verbose: true)
#
# Output:
#
# ln tmp0/t.txt tmp1/t.lnk
# ln tmp2/t.dat tmp3
# ln tmp0/t.txt tmp2/t.dat tmp4/
#
# Raises an exception if +dest+ is the path to an existing file
# and keyword argument +force+ is not +true+.
#
# FileUtils#link is an alias for FileUtils#ln.
#
# Related: FileUtils.link_entry (has different options).
#
def ln(src, dest, force: nil, noop: nil, verbose: nil)
fu_output_message "ln#{force ? ' -f' : ''} #{[src,dest].flatten.join ' '}" if verbose
return if noop
fu_each_src_dest0(src, dest) do |s,d|
remove_file d, true if force
File.link s, d
end
end
module_function :ln
alias link ln
module_function :link
# Creates {hard links}[https://en.wikipedia.org/wiki/Hard_link].
#
# Arguments +src+ (a single path or an array of paths)
# and +dest+ (a single path)
# should be {interpretable as paths}[rdoc-ref:FileUtils@Path+Arguments].
#
# If +src+ is the path to a directory and +dest+ does not exist,
# creates links +dest+ and descendents pointing to +src+ and its descendents:
#
# tree('src0')
# # => src0
# # |-- sub0
# # | |-- src0.txt
# # | `-- src1.txt
# # `-- sub1
# # |-- src2.txt
# # `-- src3.txt
# File.exist?('dest0') # => false
# FileUtils.cp_lr('src0', 'dest0')
# tree('dest0')
# # => dest0
# # |-- sub0
# # | |-- src0.txt
# # | `-- src1.txt
# # `-- sub1
# # |-- src2.txt
# # `-- src3.txt
#
# If +src+ and +dest+ are both paths to directories,
# creates links dest/src and descendents
# pointing to +src+ and its descendents:
#
# tree('src1')
# # => src1
# # |-- sub0
# # | |-- src0.txt
# # | `-- src1.txt
# # `-- sub1
# # |-- src2.txt
# # `-- src3.txt
# FileUtils.mkdir('dest1')
# FileUtils.cp_lr('src1', 'dest1')
# tree('dest1')
# # => dest1
# # `-- src1
# # |-- sub0
# # | |-- src0.txt
# # | `-- src1.txt
# # `-- sub1
# # |-- src2.txt
# # `-- src3.txt
#
# If +src+ is an array of paths to entries and +dest+ is the path to a directory,
# for each path +filepath+ in +src+, creates a link at dest/filepath
# pointing to that path:
#
# tree('src2')
# # => src2
# # |-- sub0
# # | |-- src0.txt
# # | `-- src1.txt
# # `-- sub1
# # |-- src2.txt
# # `-- src3.txt
# FileUtils.mkdir('dest2')
# FileUtils.cp_lr(['src2/sub0', 'src2/sub1'], 'dest2')
# tree('dest2')
# # => dest2
# # |-- sub0
# # | |-- src0.txt
# # | `-- src1.txt
# # `-- sub1
# # |-- src2.txt
# # `-- src3.txt
#
# Keyword arguments:
#
# - dereference_root: false - if +src+ is a symbolic link,
# does not dereference it.
# - noop: true - does not create links.
# - remove_destination: true - removes +dest+ before creating links.
# - verbose: true - prints an equivalent command:
#
# FileUtils.cp_lr('src0', 'dest0', noop: true, verbose: true)
# FileUtils.cp_lr('src1', 'dest1', noop: true, verbose: true)
# FileUtils.cp_lr(['src2/sub0', 'src2/sub1'], 'dest2', noop: true, verbose: true)
#
# Output:
#
# cp -lr src0 dest0
# cp -lr src1 dest1
# cp -lr src2/sub0 src2/sub1 dest2
#
# Raises an exception if +dest+ is the path to an existing file or directory
# and keyword argument remove_destination: true is not given.
#
# Related: {methods for copying}[rdoc-ref:FileUtils@Copying].
#
def cp_lr(src, dest, noop: nil, verbose: nil,
dereference_root: true, remove_destination: false)
fu_output_message "cp -lr#{remove_destination ? ' --remove-destination' : ''} #{[src,dest].flatten.join ' '}" if verbose
return if noop
fu_each_src_dest(src, dest) do |s, d|
link_entry s, d, dereference_root, remove_destination
end
end
module_function :cp_lr
# Creates {symbolic links}[https://en.wikipedia.org/wiki/Symbolic_link].
#
# Arguments +src+ (a single path or an array of paths)
# and +dest+ (a single path)
# should be {interpretable as paths}[rdoc-ref:FileUtils@Path+Arguments].
#
# If +src+ is the path to an existing file:
#
# - When +dest+ is the path to a non-existent file,
# creates a symbolic link at +dest+ pointing to +src+:
#
# FileUtils.touch('src0.txt')
# File.exist?('dest0.txt') # => false
# FileUtils.ln_s('src0.txt', 'dest0.txt')
# File.symlink?('dest0.txt') # => true
#
# - When +dest+ is the path to an existing file,
# creates a symbolic link at +dest+ pointing to +src+
# if and only if keyword argument force: true is given
# (raises an exception otherwise):
#
# FileUtils.touch('src1.txt')
# FileUtils.touch('dest1.txt')
# FileUtils.ln_s('src1.txt', 'dest1.txt', force: true)
# FileTest.symlink?('dest1.txt') # => true
#
# FileUtils.ln_s('src1.txt', 'dest1.txt') # Raises Errno::EEXIST.
#
# If +dest+ is the path to a directory,
# creates a symbolic link at dest/src pointing to +src+:
#
# FileUtils.touch('src2.txt')
# FileUtils.mkdir('destdir2')
# FileUtils.ln_s('src2.txt', 'destdir2')
# File.symlink?('destdir2/src2.txt') # => true
#
# If +src+ is an array of paths to existing files and +dest+ is a directory,
# for each child +child+ in +src+ creates a symbolic link dest/child
# pointing to +child+:
#
# FileUtils.mkdir('srcdir3')
# FileUtils.touch('srcdir3/src0.txt')
# FileUtils.touch('srcdir3/src1.txt')
# FileUtils.mkdir('destdir3')
# FileUtils.ln_s(['srcdir3/src0.txt', 'srcdir3/src1.txt'], 'destdir3')
# File.symlink?('destdir3/src0.txt') # => true
# File.symlink?('destdir3/src1.txt') # => true
#
# Keyword arguments:
#
# - force: true - overwrites +dest+ if it exists.
# - noop: true - does not create links.
# - verbose: true - prints an equivalent command:
#
# FileUtils.ln_s('src0.txt', 'dest0.txt', noop: true, verbose: true)
# FileUtils.ln_s('src1.txt', 'destdir1', noop: true, verbose: true)
# FileUtils.ln_s('src2.txt', 'dest2.txt', force: true, noop: true, verbose: true)
# FileUtils.ln_s(['srcdir3/src0.txt', 'srcdir3/src1.txt'], 'destdir3', noop: true, verbose: true)
#
# Output:
#
# ln -s src0.txt dest0.txt
# ln -s src1.txt destdir1
# ln -sf src2.txt dest2.txt
# ln -s srcdir3/src0.txt srcdir3/src1.txt destdir3
#
# FileUtils.symlink is an alias for FileUtils.ln_s.
#
# Related: FileUtils.ln_sf.
#
def ln_s(src, dest, force: nil, noop: nil, verbose: nil)
fu_output_message "ln -s#{force ? 'f' : ''} #{[src,dest].flatten.join ' '}" if verbose
return if noop
fu_each_src_dest0(src, dest) do |s,d|
remove_file d, true if force
File.symlink s, d
end
end
module_function :ln_s
alias symlink ln_s
module_function :symlink
# Like FileUtils.ln_s, but always with keyword argument force: true given.
#
def ln_sf(src, dest, noop: nil, verbose: nil)
ln_s src, dest, force: true, noop: noop, verbose: verbose
end
module_function :ln_sf
# Creates {hard links}[https://en.wikipedia.org/wiki/Hard_link]; returns +nil+.
#
# Arguments +src+ and +dest+
# should be {interpretable as paths}[rdoc-ref:FileUtils@Path+Arguments].
#
# If +src+ is the path to a file and +dest+ does not exist,
# creates a hard link at +dest+ pointing to +src+:
#
# FileUtils.touch('src0.txt')
# File.exist?('dest0.txt') # => false
# FileUtils.link_entry('src0.txt', 'dest0.txt')
# File.file?('dest0.txt') # => true
#
# If +src+ is the path to a directory and +dest+ does not exist,
# recursively creates hard links at +dest+ pointing to paths in +src+:
#
# FileUtils.mkdir_p(['src1/dir0', 'src1/dir1'])
# src_file_paths = [
# 'src1/dir0/t0.txt',
# 'src1/dir0/t1.txt',
# 'src1/dir1/t2.txt',
# 'src1/dir1/t3.txt',
# ]
# FileUtils.touch(src_file_paths)
# File.directory?('dest1') # => true
# FileUtils.link_entry('src1', 'dest1')
# File.file?('dest1/dir0/t0.txt') # => true
# File.file?('dest1/dir0/t1.txt') # => true
# File.file?('dest1/dir1/t2.txt') # => true
# File.file?('dest1/dir1/t3.txt') # => true
#
# Keyword arguments:
#
# - dereference_root: true - dereferences +src+ if it is a symbolic link.
# - remove_destination: true - removes +dest+ before creating links.
#
# Raises an exception if +dest+ is the path to an existing file or directory
# and keyword argument remove_destination: true is not given.
#
# Related: FileUtils.ln (has different options).
#
def link_entry(src, dest, dereference_root = false, remove_destination = false)
Entry_.new(src, nil, dereference_root).traverse do |ent|
destent = Entry_.new(dest, ent.rel, false)
File.unlink destent.path if remove_destination && File.file?(destent.path)
ent.link destent.path
end
end
module_function :link_entry
# Copies files.
#
# Arguments +src+ (a single path or an array of paths)
# and +dest+ (a single path)
# should be {interpretable as paths}[rdoc-ref:FileUtils@Path+Arguments].
#
# If +src+ is the path to a file and +dest+ is not the path to a directory,
# copies +src+ to +dest+:
#
# FileUtils.touch('src0.txt')
# File.exist?('dest0.txt') # => false
# FileUtils.cp('src0.txt', 'dest0.txt')
# File.file?('dest0.txt') # => true
#
# If +src+ is the path to a file and +dest+ is the path to a directory,
# copies +src+ to dest/src:
#
# FileUtils.touch('src1.txt')
# FileUtils.mkdir('dest1')
# FileUtils.cp('src1.txt', 'dest1')
# File.file?('dest1/src1.txt') # => true
#
# If +src+ is an array of paths to files and +dest+ is the path to a directory,
# copies from each +src+ to +dest+:
#
# src_file_paths = ['src2.txt', 'src2.dat']
# FileUtils.touch(src_file_paths)
# FileUtils.mkdir('dest2')
# FileUtils.cp(src_file_paths, 'dest2')
# File.file?('dest2/src2.txt') # => true
# File.file?('dest2/src2.dat') # => true
#
# Keyword arguments:
#
# - preserve: true - preserves file times.
# - noop: true - does not copy files.
# - verbose: true - prints an equivalent command:
#
# FileUtils.cp('src0.txt', 'dest0.txt', noop: true, verbose: true)
# FileUtils.cp('src1.txt', 'dest1', noop: true, verbose: true)
# FileUtils.cp(src_file_paths, 'dest2', noop: true, verbose: true)
#
# Output:
#
# cp src0.txt dest0.txt
# cp src1.txt dest1
# cp src2.txt src2.dat dest2
#
# Raises an exception if +src+ is a directory.
#
# FileUtils.copy is an alias for FileUtils.cp.
#
# Related: {methods for copying}[rdoc-ref:FileUtils@Copying].
#
def cp(src, dest, preserve: nil, noop: nil, verbose: nil)
fu_output_message "cp#{preserve ? ' -p' : ''} #{[src,dest].flatten.join ' '}" if verbose
return if noop
fu_each_src_dest(src, dest) do |s, d|
copy_file s, d, preserve
end
end
module_function :cp
alias copy cp
module_function :copy
# Recursively copies files.
#
# Arguments +src+ (a single path or an array of paths)
# and +dest+ (a single path)
# should be {interpretable as paths}[rdoc-ref:FileUtils@Path+Arguments].
#
# The mode, owner, and group are retained in the copy;
# to change those, use FileUtils.install instead.
#
# If +src+ is the path to a file and +dest+ is not the path to a directory,
# copies +src+ to +dest+:
#
# FileUtils.touch('src0.txt')
# File.exist?('dest0.txt') # => false
# FileUtils.cp_r('src0.txt', 'dest0.txt')
# File.file?('dest0.txt') # => true
#
# If +src+ is the path to a file and +dest+ is the path to a directory,
# copies +src+ to dest/src:
#
# FileUtils.touch('src1.txt')
# FileUtils.mkdir('dest1')
# FileUtils.cp_r('src1.txt', 'dest1')
# File.file?('dest1/src1.txt') # => true
#
# If +src+ is the path to a directory and +dest+ does not exist,
# recursively copies +src+ to +dest+:
#
# tree('src2')
# # => src2
# # |-- dir0
# # | |-- src0.txt
# # | `-- src1.txt
# # `-- dir1
# # |-- src2.txt
# # `-- src3.txt
# FileUtils.exist?('dest2') # => false
# FileUtils.cp_r('src2', 'dest2')
# tree('dest2')
# # => dest2
# # |-- dir0
# # | |-- src0.txt
# # | `-- src1.txt
# # `-- dir1
# # |-- src2.txt
# # `-- src3.txt
#
# If +src+ and +dest+ are paths to directories,
# recursively copies +src+ to dest/src:
#
# tree('src3')
# # => src3
# # |-- dir0
# # | |-- src0.txt
# # | `-- src1.txt
# # `-- dir1
# # |-- src2.txt
# # `-- src3.txt
# FileUtils.mkdir('dest3')
# FileUtils.cp_r('src3', 'dest3')
# tree('dest3')
# # => dest3
# # `-- src3
# # |-- dir0
# # | |-- src0.txt
# # | `-- src1.txt
# # `-- dir1
# # |-- src2.txt
# # `-- src3.txt
#
# If +src+ is an array of paths and +dest+ is a directory,
# recursively copies from each path in +src+ to +dest+;
# the paths in +src+ may point to files and/or directories.
#
# Keyword arguments:
#
# - dereference_root: false - if +src+ is a symbolic link,
# does not dereference it.
# - noop: true - does not copy files.
# - preserve: true - preserves file times.
# - remove_destination: true - removes +dest+ before copying files.
# - verbose: true - prints an equivalent command:
#
# FileUtils.cp_r('src0.txt', 'dest0.txt', noop: true, verbose: true)
# FileUtils.cp_r('src1.txt', 'dest1', noop: true, verbose: true)
# FileUtils.cp_r('src2', 'dest2', noop: true, verbose: true)
# FileUtils.cp_r('src3', 'dest3', noop: true, verbose: true)
#
# Output:
#
# cp -r src0.txt dest0.txt
# cp -r src1.txt dest1
# cp -r src2 dest2
# cp -r src3 dest3
#
# Raises an exception of +src+ is the path to a directory
# and +dest+ is the path to a file.
#
# Related: {methods for copying}[rdoc-ref:FileUtils@Copying].
#
def cp_r(src, dest, preserve: nil, noop: nil, verbose: nil,
dereference_root: true, remove_destination: nil)
fu_output_message "cp -r#{preserve ? 'p' : ''}#{remove_destination ? ' --remove-destination' : ''} #{[src,dest].flatten.join ' '}" if verbose
return if noop
fu_each_src_dest(src, dest) do |s, d|
copy_entry s, d, preserve, dereference_root, remove_destination
end
end
module_function :cp_r
# Recursively copies files from +src+ to +dest+.
#
# Arguments +src+ and +dest+
# should be {interpretable as paths}[rdoc-ref:FileUtils@Path+Arguments].
#
# If +src+ is the path to a file, copies +src+ to +dest+:
#
# FileUtils.touch('src0.txt')
# File.exist?('dest0.txt') # => false
# FileUtils.copy_entry('src0.txt', 'dest0.txt')
# File.file?('dest0.txt') # => true
#
# If +src+ is a directory, recursively copies +src+ to +dest+:
#
# tree('src1')
# # => src1
# # |-- dir0
# # | |-- src0.txt
# # | `-- src1.txt
# # `-- dir1
# # |-- src2.txt
# # `-- src3.txt
# FileUtils.copy_entry('src1', 'dest1')
# tree('dest1')
# # => dest1
# # |-- dir0
# # | |-- src0.txt
# # | `-- src1.txt
# # `-- dir1
# # |-- src2.txt
# # `-- src3.txt
#
# The recursive copying preserves file types for regular files,
# directories, and symbolic links;
# other file types (FIFO streams, device files, etc.) are not supported.
#
# Keyword arguments:
#
# - dereference_root: true - if +src+ is a symbolic link,
# follows the link.
# - preserve: true - preserves file times.
# - remove_destination: true - removes +dest+ before copying files.
#
# Related: {methods for copying}[rdoc-ref:FileUtils@Copying].
#
def copy_entry(src, dest, preserve = false, dereference_root = false, remove_destination = false)
if dereference_root
src = File.realpath(src)
end
Entry_.new(src, nil, false).wrap_traverse(proc do |ent|
destent = Entry_.new(dest, ent.rel, false)
File.unlink destent.path if remove_destination && (File.file?(destent.path) || File.symlink?(destent.path))
ent.copy destent.path
end, proc do |ent|
destent = Entry_.new(dest, ent.rel, false)
ent.copy_metadata destent.path if preserve
end)
end
module_function :copy_entry
# Copies file from +src+ to +dest+, which should not be directories.
#
# Arguments +src+ and +dest+
# should be {interpretable as paths}[rdoc-ref:FileUtils@Path+Arguments].
#
# Examples:
#
# FileUtils.touch('src0.txt')
# FileUtils.copy_file('src0.txt', 'dest0.txt')
# File.file?('dest0.txt') # => true
#
# Keyword arguments:
#
# - dereference: false - if +src+ is a symbolic link,
# does not follow the link.
# - preserve: true - preserves file times.
# - remove_destination: true - removes +dest+ before copying files.
#
# Related: {methods for copying}[rdoc-ref:FileUtils@Copying].
#
def copy_file(src, dest, preserve = false, dereference = true)
ent = Entry_.new(src, nil, dereference)
ent.copy_file dest
ent.copy_metadata dest if preserve
end
module_function :copy_file
# Copies \IO stream +src+ to \IO stream +dest+ via
# {IO.copy_stream}[https://docs.ruby-lang.org/en/master/IO.html#method-c-copy_stream].
#
# Related: {methods for copying}[rdoc-ref:FileUtils@Copying].
#
def copy_stream(src, dest)
IO.copy_stream(src, dest)
end
module_function :copy_stream
# Moves entries.
#
# Arguments +src+ (a single path or an array of paths)
# and +dest+ (a single path)
# should be {interpretable as paths}[rdoc-ref:FileUtils@Path+Arguments].
#
# If +src+ and +dest+ are on different file systems,
# first copies, then removes +src+.
#
# May cause a local vulnerability if not called with keyword argument
# secure: true;
# see {Avoiding the TOCTTOU Vulnerability}[rdoc-ref:FileUtils@Avoiding+the+TOCTTOU+Vulnerability].
#
# If +src+ is the path to a single file or directory and +dest+ does not exist,
# moves +src+ to +dest+:
#
# tree('src0')
# # => src0
# # |-- src0.txt
# # `-- src1.txt
# File.exist?('dest0') # => false
# FileUtils.mv('src0', 'dest0')
# File.exist?('src0') # => false
# tree('dest0')
# # => dest0
# # |-- src0.txt
# # `-- src1.txt
#
# If +src+ is an array of paths to files and directories
# and +dest+ is the path to a directory,
# copies from each path in the array to +dest+:
#
# File.file?('src1.txt') # => true
# tree('src1')
# # => src1
# # |-- src.dat
# # `-- src.txt
# Dir.empty?('dest1') # => true
# FileUtils.mv(['src1.txt', 'src1'], 'dest1')
# tree('dest1')
# # => dest1
# # |-- src1
# # | |-- src.dat
# # | `-- src.txt
# # `-- src1.txt
#
# Keyword arguments:
#
# - force: true - if the move includes removing +src+
# (that is, if +src+ and +dest+ are on different file systems),
# ignores raised exceptions of StandardError and its descendants.
# - noop: true - does not move files.
# - secure: true - removes +src+ securely;
# see details at FileUtils.remove_entry_secure.
# - verbose: true - prints an equivalent command:
#
# FileUtils.mv('src0', 'dest0', noop: true, verbose: true)
# FileUtils.mv(['src1.txt', 'src1'], 'dest1', noop: true, verbose: true)
#
# Output:
#
# mv src0 dest0
# mv src1.txt src1 dest1
#
# FileUtils.move is an alias for FileUtils.mv.
#
def mv(src, dest, force: nil, noop: nil, verbose: nil, secure: nil)
fu_output_message "mv#{force ? ' -f' : ''} #{[src,dest].flatten.join ' '}" if verbose
return if noop
fu_each_src_dest(src, dest) do |s, d|
destent = Entry_.new(d, nil, true)
begin
if destent.exist?
if destent.directory?
raise Errno::EEXIST, d
end
end
begin
File.rename s, d
rescue Errno::EXDEV,
Errno::EPERM # move from unencrypted to encrypted dir (ext4)
copy_entry s, d, true
if secure
remove_entry_secure s, force
else
remove_entry s, force
end
end
rescue SystemCallError
raise unless force
end
end
end
module_function :mv
alias move mv
module_function :move
# Removes entries at the paths in the given +list+
# (a single path or an array of paths)
# returns +list+, if it is an array, [list] otherwise.
#
# Argument +list+ or its elements
# should be {interpretable as paths}[rdoc-ref:FileUtils@Path+Arguments].
#
# With no keyword arguments, removes files at the paths given in +list+:
#
# FileUtils.touch(['src0.txt', 'src0.dat'])
# FileUtils.rm(['src0.dat', 'src0.txt']) # => ["src0.dat", "src0.txt"]
#
# Keyword arguments:
#
# - force: true - ignores raised exceptions of StandardError
# and its descendants.
# - noop: true - does not remove files; returns +nil+.
# - verbose: true - prints an equivalent command:
#
# FileUtils.rm(['src0.dat', 'src0.txt'], noop: true, verbose: true)
#
# Output:
#
# rm src0.dat src0.txt
#
# FileUtils.remove is an alias for FileUtils.rm.
#
# Related: {methods for deleting}[rdoc-ref:FileUtils@Deleting].
#
def rm(list, force: nil, noop: nil, verbose: nil)
list = fu_list(list)
fu_output_message "rm#{force ? ' -f' : ''} #{list.join ' '}" if verbose
return if noop
list.each do |path|
remove_file path, force
end
end
module_function :rm
alias remove rm
module_function :remove
# Equivalent to:
#
# FileUtils.rm(list, force: true, **kwargs)
#
# Argument +list+ (a single path or an array of paths)
# should be {interpretable as paths}[rdoc-ref:FileUtils@Path+Arguments].
#
# See FileUtils.rm for keyword arguments.
#
# FileUtils.safe_unlink is an alias for FileUtils.rm_f.
#
# Related: {methods for deleting}[rdoc-ref:FileUtils@Deleting].
#
def rm_f(list, noop: nil, verbose: nil)
rm list, force: true, noop: noop, verbose: verbose
end
module_function :rm_f
alias safe_unlink rm_f
module_function :safe_unlink
# Removes entries at the paths in the given +list+
# (a single path or an array of paths);
# returns +list+, if it is an array, [list] otherwise.
#
# Argument +list+ or its elements
# should be {interpretable as paths}[rdoc-ref:FileUtils@Path+Arguments].
#
# May cause a local vulnerability if not called with keyword argument
# secure: true;
# see {Avoiding the TOCTTOU Vulnerability}[rdoc-ref:FileUtils@Avoiding+the+TOCTTOU+Vulnerability].
#
# For each file path, removes the file at that path:
#
# FileUtils.touch(['src0.txt', 'src0.dat'])
# FileUtils.rm_r(['src0.dat', 'src0.txt'])
# File.exist?('src0.txt') # => false
# File.exist?('src0.dat') # => false
#
# For each directory path, recursively removes files and directories:
#
# tree('src1')
# # => src1
# # |-- dir0
# # | |-- src0.txt
# # | `-- src1.txt
# # `-- dir1
# # |-- src2.txt
# # `-- src3.txt
# FileUtils.rm_r('src1')
# File.exist?('src1') # => false
#
# Keyword arguments:
#
# - force: true - ignores raised exceptions of StandardError
# and its descendants.
# - noop: true - does not remove entries; returns +nil+.
# - secure: true - removes +src+ securely;
# see details at FileUtils.remove_entry_secure.
# - verbose: true - prints an equivalent command:
#
# FileUtils.rm_r(['src0.dat', 'src0.txt'], noop: true, verbose: true)
# FileUtils.rm_r('src1', noop: true, verbose: true)
#
# Output:
#
# rm -r src0.dat src0.txt
# rm -r src1
#
# Related: {methods for deleting}[rdoc-ref:FileUtils@Deleting].
#
def rm_r(list, force: nil, noop: nil, verbose: nil, secure: nil)
list = fu_list(list)
fu_output_message "rm -r#{force ? 'f' : ''} #{list.join ' '}" if verbose
return if noop
list.each do |path|
if secure
remove_entry_secure path, force
else
remove_entry path, force
end
end
end
module_function :rm_r
# Equivalent to:
#
# FileUtils.rm_r(list, force: true, **kwargs)
#
# Argument +list+ or its elements
# should be {interpretable as paths}[rdoc-ref:FileUtils@Path+Arguments].
#
# May cause a local vulnerability if not called with keyword argument
# secure: true;
# see {Avoiding the TOCTTOU Vulnerability}[rdoc-ref:FileUtils@Avoiding+the+TOCTTOU+Vulnerability].
#
# See FileUtils.rm_r for keyword arguments.
#
# FileUtils.rmtree is an alias for FileUtils.rm_rf.
#
# Related: {methods for deleting}[rdoc-ref:FileUtils@Deleting].
#
def rm_rf(list, noop: nil, verbose: nil, secure: nil)
rm_r list, force: true, noop: noop, verbose: verbose, secure: secure
end
module_function :rm_rf
alias rmtree rm_rf
module_function :rmtree
# Securely removes the entry given by +path+,
# which should be the entry for a regular file, a symbolic link,
# or a directory.
#
# Argument +path+
# should be {interpretable as a path}[rdoc-ref:FileUtils@Path+Arguments].
#
# Avoids a local vulnerability that can exist in certain circumstances;
# see {Avoiding the TOCTTOU Vulnerability}[rdoc-ref:FileUtils@Avoiding+the+TOCTTOU+Vulnerability].
#
# Optional argument +force+ specifies whether to ignore
# raised exceptions of StandardError and its descendants.
#
# Related: {methods for deleting}[rdoc-ref:FileUtils@Deleting].
#
def remove_entry_secure(path, force = false)
unless fu_have_symlink?
remove_entry path, force
return
end
fullpath = File.expand_path(path)
st = File.lstat(fullpath)
unless st.directory?
File.unlink fullpath
return
end
# is a directory.
parent_st = File.stat(File.dirname(fullpath))
unless parent_st.world_writable?
remove_entry path, force
return
end
unless parent_st.sticky?
raise ArgumentError, "parent directory is world writable, FileUtils#remove_entry_secure does not work; abort: #{path.inspect} (parent directory mode #{'%o' % parent_st.mode})"
end
# freeze tree root
euid = Process.euid
dot_file = fullpath + "/."
begin
File.open(dot_file) {|f|
unless fu_stat_identical_entry?(st, f.stat)
# symlink (TOC-to-TOU attack?)
File.unlink fullpath
return
end
f.chown euid, -1
f.chmod 0700
}
rescue Errno::EISDIR # JRuby in non-native mode can't open files as dirs
File.lstat(dot_file).tap {|fstat|
unless fu_stat_identical_entry?(st, fstat)
# symlink (TOC-to-TOU attack?)
File.unlink fullpath
return
end
File.chown euid, -1, dot_file
File.chmod 0700, dot_file
}
end
unless fu_stat_identical_entry?(st, File.lstat(fullpath))
# TOC-to-TOU attack?
File.unlink fullpath
return
end
# ---- tree root is frozen ----
root = Entry_.new(path)
root.preorder_traverse do |ent|
if ent.directory?
ent.chown euid, -1
ent.chmod 0700
end
end
root.postorder_traverse do |ent|
begin
ent.remove
rescue
raise unless force
end
end
rescue
raise unless force
end
module_function :remove_entry_secure
def fu_have_symlink? #:nodoc:
File.symlink nil, nil
rescue NotImplementedError
return false
rescue TypeError
return true
end
private_module_function :fu_have_symlink?
def fu_stat_identical_entry?(a, b) #:nodoc:
a.dev == b.dev and a.ino == b.ino
end
private_module_function :fu_stat_identical_entry?
# Removes the entry given by +path+,
# which should be the entry for a regular file, a symbolic link,
# or a directory.
#
# Argument +path+
# should be {interpretable as a path}[rdoc-ref:FileUtils@Path+Arguments].
#
# Optional argument +force+ specifies whether to ignore
# raised exceptions of StandardError and its descendants.
#
# Related: FileUtils.remove_entry_secure.
#
def remove_entry(path, force = false)
Entry_.new(path).postorder_traverse do |ent|
begin
ent.remove
rescue
raise unless force
end
end
rescue
raise unless force
end
module_function :remove_entry
# Removes the file entry given by +path+,
# which should be the entry for a regular file or a symbolic link.
#
# Argument +path+
# should be {interpretable as a path}[rdoc-ref:FileUtils@Path+Arguments].
#
# Optional argument +force+ specifies whether to ignore
# raised exceptions of StandardError and its descendants.
#
# Related: {methods for deleting}[rdoc-ref:FileUtils@Deleting].
#
def remove_file(path, force = false)
Entry_.new(path).remove_file
rescue
raise unless force
end
module_function :remove_file
# Recursively removes the directory entry given by +path+,
# which should be the entry for a regular file, a symbolic link,
# or a directory.
#
# Argument +path+
# should be {interpretable as a path}[rdoc-ref:FileUtils@Path+Arguments].
#
# Optional argument +force+ specifies whether to ignore
# raised exceptions of StandardError and its descendants.
#
# Related: {methods for deleting}[rdoc-ref:FileUtils@Deleting].
#
def remove_dir(path, force = false)
remove_entry path, force # FIXME?? check if it is a directory
end
module_function :remove_dir
# Returns +true+ if the contents of files +a+ and +b+ are identical,
# +false+ otherwise.
#
# Arguments +a+ and +b+
# should be {interpretable as a path}[rdoc-ref:FileUtils@Path+Arguments].
#
# FileUtils.identical? and FileUtils.cmp are aliases for FileUtils.compare_file.
#
# Related: FileUtils.compare_stream.
#
def compare_file(a, b)
return false unless File.size(a) == File.size(b)
File.open(a, 'rb') {|fa|
File.open(b, 'rb') {|fb|
return compare_stream(fa, fb)
}
}
end
module_function :compare_file
alias identical? compare_file
alias cmp compare_file
module_function :identical?
module_function :cmp
# Returns +true+ if the contents of streams +a+ and +b+ are identical,
# +false+ otherwise.
#
# Arguments +a+ and +b+
# should be {interpretable as a path}[rdoc-ref:FileUtils@Path+Arguments].
#
# Related: FileUtils.compare_file.
#
def compare_stream(a, b)
bsize = fu_stream_blksize(a, b)
sa = String.new(capacity: bsize)
sb = String.new(capacity: bsize)
begin
a.read(bsize, sa)
b.read(bsize, sb)
return true if sa.empty? && sb.empty?
end while sa == sb
false
end
module_function :compare_stream
# Copies a file entry.
# See {install(1)}[https://man7.org/linux/man-pages/man1/install.1.html].
#
# Arguments +src+ (a single path or an array of paths)
# and +dest+ (a single path)
# should be {interpretable as paths}[rdoc-ref:FileUtils@Path+Arguments];
#
# If the entry at +dest+ does not exist, copies from +src+ to +dest+:
#
# File.read('src0.txt') # => "aaa\n"
# File.exist?('dest0.txt') # => false
# FileUtils.install('src0.txt', 'dest0.txt')
# File.read('dest0.txt') # => "aaa\n"
#
# If +dest+ is a file entry, copies from +src+ to +dest+, overwriting:
#
# File.read('src1.txt') # => "aaa\n"
# File.read('dest1.txt') # => "bbb\n"
# FileUtils.install('src1.txt', 'dest1.txt')
# File.read('dest1.txt') # => "aaa\n"
#
# If +dest+ is a directory entry, copies from +src+ to dest/src,
# overwriting if necessary:
#
# File.read('src2.txt') # => "aaa\n"
# File.read('dest2/src2.txt') # => "bbb\n"
# FileUtils.install('src2.txt', 'dest2')
# File.read('dest2/src2.txt') # => "aaa\n"
#
# If +src+ is an array of paths and +dest+ points to a directory,
# copies each path +path+ in +src+ to dest/path:
#
# File.file?('src3.txt') # => true
# File.file?('src3.dat') # => true
# FileUtils.mkdir('dest3')
# FileUtils.install(['src3.txt', 'src3.dat'], 'dest3')
# File.file?('dest3/src3.txt') # => true
# File.file?('dest3/src3.dat') # => true
#
# Keyword arguments:
#
# - group: group - changes the group if not +nil+,
# using {File.chown}[https://docs.ruby-lang.org/en/master/File.html#method-c-chown].
# - mode: permissions - changes the permissions.
# using {File.chmod}[https://docs.ruby-lang.org/en/master/File.html#method-c-chmod].
# - noop: true - does not copy entries; returns +nil+.
# - owner: owner - changes the owner if not +nil+,
# using {File.chown}[https://docs.ruby-lang.org/en/master/File.html#method-c-chown].
# - preserve: true - preserve timestamps
# using {File.utime}[https://docs.ruby-lang.org/en/master/File.html#method-c-utime].
# - verbose: true - prints an equivalent command:
#
# FileUtils.install('src0.txt', 'dest0.txt', noop: true, verbose: true)
# FileUtils.install('src1.txt', 'dest1.txt', noop: true, verbose: true)
# FileUtils.install('src2.txt', 'dest2', noop: true, verbose: true)
#
# Output:
#
# install -c src0.txt dest0.txt
# install -c src1.txt dest1.txt
# install -c src2.txt dest2
#
# Related: {methods for copying}[rdoc-ref:FileUtils@Copying].
#
def install(src, dest, mode: nil, owner: nil, group: nil, preserve: nil,
noop: nil, verbose: nil)
if verbose
msg = +"install -c"
msg << ' -p' if preserve
msg << ' -m ' << mode_to_s(mode) if mode
msg << " -o #{owner}" if owner
msg << " -g #{group}" if group
msg << ' ' << [src,dest].flatten.join(' ')
fu_output_message msg
end
return if noop
uid = fu_get_uid(owner)
gid = fu_get_gid(group)
fu_each_src_dest(src, dest) do |s, d|
st = File.stat(s)
unless File.exist?(d) and compare_file(s, d)
remove_file d, true
copy_file s, d
File.utime st.atime, st.mtime, d if preserve
File.chmod fu_mode(mode, st), d if mode
File.chown uid, gid, d if uid or gid
end
end
end
module_function :install
def user_mask(target) #:nodoc:
target.each_char.inject(0) do |mask, chr|
case chr
when "u"
mask | 04700
when "g"
mask | 02070
when "o"
mask | 01007
when "a"
mask | 07777
else
raise ArgumentError, "invalid `who' symbol in file mode: #{chr}"
end
end
end
private_module_function :user_mask
def apply_mask(mode, user_mask, op, mode_mask) #:nodoc:
case op
when '='
(mode & ~user_mask) | (user_mask & mode_mask)
when '+'
mode | (user_mask & mode_mask)
when '-'
mode & ~(user_mask & mode_mask)
end
end
private_module_function :apply_mask
def symbolic_modes_to_i(mode_sym, path) #:nodoc:
path = File.stat(path) unless File::Stat === path
mode = path.mode
mode_sym.split(/,/).inject(mode & 07777) do |current_mode, clause|
target, *actions = clause.split(/([=+-])/)
raise ArgumentError, "invalid file mode: #{mode_sym}" if actions.empty?
target = 'a' if target.empty?
user_mask = user_mask(target)
actions.each_slice(2) do |op, perm|
need_apply = op == '='
mode_mask = (perm || '').each_char.inject(0) do |mask, chr|
case chr
when "r"
mask | 0444
when "w"
mask | 0222
when "x"
mask | 0111
when "X"
if path.directory?
mask | 0111
else
mask
end
when "s"
mask | 06000
when "t"
mask | 01000
when "u", "g", "o"
if mask.nonzero?
current_mode = apply_mask(current_mode, user_mask, op, mask)
end
need_apply = false
copy_mask = user_mask(chr)
(current_mode & copy_mask) / (copy_mask & 0111) * (user_mask & 0111)
else
raise ArgumentError, "invalid `perm' symbol in file mode: #{chr}"
end
end
if mode_mask.nonzero? || need_apply
current_mode = apply_mask(current_mode, user_mask, op, mode_mask)
end
end
current_mode
end
end
private_module_function :symbolic_modes_to_i
def fu_mode(mode, path) #:nodoc:
mode.is_a?(String) ? symbolic_modes_to_i(mode, path) : mode
end
private_module_function :fu_mode
def mode_to_s(mode) #:nodoc:
mode.is_a?(String) ? mode : "%o" % mode
end
private_module_function :mode_to_s
# Changes permissions on the entries at the paths given in +list+
# (a single path or an array of paths)
# to the permissions given by +mode+;
# returns +list+ if it is an array, [list] otherwise:
#
# - Modifies each entry that is a regular file using
# {File.chmod}[https://docs.ruby-lang.org/en/master/File.html#method-c-chmod].
# - Modifies each entry that is a symbolic link using
# {File.lchmod}[https://docs.ruby-lang.org/en/master/File.html#method-c-lchmod].
#
# Argument +list+ or its elements
# should be {interpretable as paths}[rdoc-ref:FileUtils@Path+Arguments].
#
# Argument +mode+ may be either an integer or a string:
#
# - \Integer +mode+: represents the permission bits to be set:
#
# FileUtils.chmod(0755, 'src0.txt')
# FileUtils.chmod(0644, ['src0.txt', 'src0.dat'])
#
# - \String +mode+: represents the permissions to be set:
#
# The string is of the form [targets][[operator][perms[,perms]], where:
#
# - +targets+ may be any combination of these letters:
#
# - 'u': permissions apply to the file's owner.
# - 'g': permissions apply to users in the file's group.
# - 'o': permissions apply to other users not in the file's group.
# - 'a' (the default): permissions apply to all users.
#
# - +operator+ may be one of these letters:
#
# - '+': adds permissions.
# - '-': removes permissions.
# - '=': sets (replaces) permissions.
#
# - +perms+ (may be repeated, with separating commas)
# may be any combination of these letters:
#
# - 'r': Read.
# - 'w': Write.
# - 'x': Execute (search, for a directory).
# - 'X': Search (for a directories only;
# must be used with '+')
# - 's': Uid or gid.
# - 't': Sticky bit.
#
# Examples:
#
# FileUtils.chmod('u=wrx,go=rx', 'src1.txt')
# FileUtils.chmod('u=wrx,go=rx', '/usr/bin/ruby')
#
# Keyword arguments:
#
# - noop: true - does not change permissions; returns +nil+.
# - verbose: true - prints an equivalent command:
#
# FileUtils.chmod(0755, 'src0.txt', noop: true, verbose: true)
# FileUtils.chmod(0644, ['src0.txt', 'src0.dat'], noop: true, verbose: true)
# FileUtils.chmod('u=wrx,go=rx', 'src1.txt', noop: true, verbose: true)
# FileUtils.chmod('u=wrx,go=rx', '/usr/bin/ruby', noop: true, verbose: true)
#
# Output:
#
# chmod 755 src0.txt
# chmod 644 src0.txt src0.dat
# chmod u=wrx,go=rx src1.txt
# chmod u=wrx,go=rx /usr/bin/ruby
#
# Related: FileUtils.chmod_R.
#
def chmod(mode, list, noop: nil, verbose: nil)
list = fu_list(list)
fu_output_message sprintf('chmod %s %s', mode_to_s(mode), list.join(' ')) if verbose
return if noop
list.each do |path|
Entry_.new(path).chmod(fu_mode(mode, path))
end
end
module_function :chmod
# Like FileUtils.chmod, but changes permissions recursively.
#
def chmod_R(mode, list, noop: nil, verbose: nil, force: nil)
list = fu_list(list)
fu_output_message sprintf('chmod -R%s %s %s',
(force ? 'f' : ''),
mode_to_s(mode), list.join(' ')) if verbose
return if noop
list.each do |root|
Entry_.new(root).traverse do |ent|
begin
ent.chmod(fu_mode(mode, ent.path))
rescue
raise unless force
end
end
end
end
module_function :chmod_R
# Changes the owner and group on the entries at the paths given in +list+
# (a single path or an array of paths)
# to the given +user+ and +group+;
# returns +list+ if it is an array, [list] otherwise:
#
# - Modifies each entry that is a regular file using
# {File.chown}[https://docs.ruby-lang.org/en/master/File.html#method-c-chown].
# - Modifies each entry that is a symbolic link using
# {File.lchown}[https://docs.ruby-lang.org/en/master/File.html#method-c-lchown].
#
# Argument +list+ or its elements
# should be {interpretable as paths}[rdoc-ref:FileUtils@Path+Arguments].
#
# User and group:
#
# - Argument +user+ may be a user name or a user id;
# if +nil+ or +-1+, the user is not changed.
# - Argument +group+ may be a group name or a group id;
# if +nil+ or +-1+, the group is not changed.
# - The user must be a member of the group.
#
# Examples:
#
# # One path.
# # User and group as string names.
# File.stat('src0.txt').uid # => 1004
# File.stat('src0.txt').gid # => 1004
# FileUtils.chown('user2', 'group1', 'src0.txt')
# File.stat('src0.txt').uid # => 1006
# File.stat('src0.txt').gid # => 1005
#
# # User and group as uid and gid.
# FileUtils.chown(1004, 1004, 'src0.txt')
# File.stat('src0.txt').uid # => 1004
# File.stat('src0.txt').gid # => 1004
#
# # Array of paths.
# FileUtils.chown(1006, 1005, ['src0.txt', 'src0.dat'])
#
# # Directory (not recursive).
# FileUtils.chown('user2', 'group1', '.')
#
# Keyword arguments:
#
# - noop: true - does not change permissions; returns +nil+.
# - verbose: true - prints an equivalent command:
#
# FileUtils.chown('user2', 'group1', 'src0.txt', noop: true, verbose: true)
# FileUtils.chown(1004, 1004, 'src0.txt', noop: true, verbose: true)
# FileUtils.chown(1006, 1005, ['src0.txt', 'src0.dat'], noop: true, verbose: true)
# FileUtils.chown('user2', 'group1', path, noop: true, verbose: true)
# FileUtils.chown('user2', 'group1', '.', noop: true, verbose: true)
#
# Output:
#
# chown user2:group1 src0.txt
# chown 1004:1004 src0.txt
# chown 1006:1005 src0.txt src0.dat
# chown user2:group1 src0.txt
# chown user2:group1 .
#
# Related: FileUtils.chown_R.
#
def chown(user, group, list, noop: nil, verbose: nil)
list = fu_list(list)
fu_output_message sprintf('chown %s %s',
(group ? "#{user}:#{group}" : user || ':'),
list.join(' ')) if verbose
return if noop
uid = fu_get_uid(user)
gid = fu_get_gid(group)
list.each do |path|
Entry_.new(path).chown uid, gid
end
end
module_function :chown
# Like FileUtils.chown, but changes owner and group recursively.
#
def chown_R(user, group, list, noop: nil, verbose: nil, force: nil)
list = fu_list(list)
fu_output_message sprintf('chown -R%s %s %s',
(force ? 'f' : ''),
(group ? "#{user}:#{group}" : user || ':'),
list.join(' ')) if verbose
return if noop
uid = fu_get_uid(user)
gid = fu_get_gid(group)
list.each do |root|
Entry_.new(root).traverse do |ent|
begin
ent.chown uid, gid
rescue
raise unless force
end
end
end
end
module_function :chown_R
def fu_get_uid(user) #:nodoc:
return nil unless user
case user
when Integer
user
when /\A\d+\z/
user.to_i
else
require 'etc'
Etc.getpwnam(user) ? Etc.getpwnam(user).uid : nil
end
end
private_module_function :fu_get_uid
def fu_get_gid(group) #:nodoc:
return nil unless group
case group
when Integer
group
when /\A\d+\z/
group.to_i
else
require 'etc'
Etc.getgrnam(group) ? Etc.getgrnam(group).gid : nil
end
end
private_module_function :fu_get_gid
# Updates modification times (mtime) and access times (atime)
# of the entries given by the paths in +list+
# (a single path or an array of paths);
# returns +list+ if it is an array, [list] otherwise.
#
# By default, creates an empty file for any path to a non-existent entry;
# use keyword argument +nocreate+ to raise an exception instead.
#
# Argument +list+ or its elements
# should be {interpretable as paths}[rdoc-ref:FileUtils@Path+Arguments].
#
# Examples:
#
# # Single path.
# f = File.new('src0.txt') # Existing file.
# f.atime # => 2022-06-10 11:11:21.200277 -0700
# f.mtime # => 2022-06-10 11:11:21.200277 -0700
# FileUtils.touch('src0.txt')
# f = File.new('src0.txt')
# f.atime # => 2022-06-11 08:28:09.8185343 -0700
# f.mtime # => 2022-06-11 08:28:09.8185343 -0700
#
# # Array of paths.
# FileUtils.touch(['src0.txt', 'src0.dat'])
#
# Keyword arguments:
#
# - mtime: time - sets the entry's mtime to the given time,
# instead of the current time.
# - nocreate: true - raises an exception if the entry does not exist.
# - noop: true - does not touch entries; returns +nil+.
# - verbose: true - prints an equivalent command:
#
# FileUtils.touch('src0.txt', noop: true, verbose: true)
# FileUtils.touch(['src0.txt', 'src0.dat'], noop: true, verbose: true)
# FileUtils.touch(path, noop: true, verbose: true)
#
# Output:
#
# touch src0.txt
# touch src0.txt src0.dat
# touch src0.txt
#
# Related: FileUtils.uptodate?.
#
def touch(list, noop: nil, verbose: nil, mtime: nil, nocreate: nil)
list = fu_list(list)
t = mtime
if verbose
fu_output_message "touch #{nocreate ? '-c ' : ''}#{t ? t.strftime('-t %Y%m%d%H%M.%S ') : ''}#{list.join ' '}"
end
return if noop
list.each do |path|
created = nocreate
begin
File.utime(t, t, path)
rescue Errno::ENOENT
raise if created
File.open(path, 'a') {
;
}
created = true
retry if t
end
end
end
module_function :touch
private
module StreamUtils_
private
case (defined?(::RbConfig) ? ::RbConfig::CONFIG['host_os'] : ::RUBY_PLATFORM)
when /mswin|mingw/
def fu_windows?; true end
else
def fu_windows?; false end
end
def fu_copy_stream0(src, dest, blksize = nil) #:nodoc:
IO.copy_stream(src, dest)
end
def fu_stream_blksize(*streams)
streams.each do |s|
next unless s.respond_to?(:stat)
size = fu_blksize(s.stat)
return size if size
end
fu_default_blksize()
end
def fu_blksize(st)
s = st.blksize
return nil unless s
return nil if s == 0
s
end
def fu_default_blksize
1024
end
end
include StreamUtils_
extend StreamUtils_
class Entry_ #:nodoc: internal use only
include StreamUtils_
def initialize(a, b = nil, deref = false)
@prefix = @rel = @path = nil
if b
@prefix = a
@rel = b
else
@path = a
end
@deref = deref
@stat = nil
@lstat = nil
end
def inspect
"\#<#{self.class} #{path()}>"
end
def path
if @path
File.path(@path)
else
join(@prefix, @rel)
end
end
def prefix
@prefix || @path
end
def rel
@rel
end
def dereference?
@deref
end
def exist?
begin
lstat
true
rescue Errno::ENOENT
false
end
end
def file?
s = lstat!
s and s.file?
end
def directory?
s = lstat!
s and s.directory?
end
def symlink?
s = lstat!
s and s.symlink?
end
def chardev?
s = lstat!
s and s.chardev?
end
def blockdev?
s = lstat!
s and s.blockdev?
end
def socket?
s = lstat!
s and s.socket?
end
def pipe?
s = lstat!
s and s.pipe?
end
S_IF_DOOR = 0xD000
def door?
s = lstat!
s and (s.mode & 0xF000 == S_IF_DOOR)
end
def entries
opts = {}
opts[:encoding] = fu_windows? ? ::Encoding::UTF_8 : path.encoding
files = Dir.children(path, **opts)
untaint = RUBY_VERSION < '2.7'
files.map {|n| Entry_.new(prefix(), join(rel(), untaint ? n.untaint : n)) }
end
def stat
return @stat if @stat
if lstat() and lstat().symlink?
@stat = File.stat(path())
else
@stat = lstat()
end
@stat
end
def stat!
return @stat if @stat
if lstat! and lstat!.symlink?
@stat = File.stat(path())
else
@stat = lstat!
end
@stat
rescue SystemCallError
nil
end
def lstat
if dereference?
@lstat ||= File.stat(path())
else
@lstat ||= File.lstat(path())
end
end
def lstat!
lstat()
rescue SystemCallError
nil
end
def chmod(mode)
if symlink?
File.lchmod mode, path() if have_lchmod?
else
File.chmod mode, path()
end
rescue Errno::EOPNOTSUPP
end
def chown(uid, gid)
if symlink?
File.lchown uid, gid, path() if have_lchown?
else
File.chown uid, gid, path()
end
end
def link(dest)
case
when directory?
if !File.exist?(dest) and descendant_directory?(dest, path)
raise ArgumentError, "cannot link directory %s to itself %s" % [path, dest]
end
begin
Dir.mkdir dest
rescue
raise unless File.directory?(dest)
end
else
File.link path(), dest
end
end
def copy(dest)
lstat
case
when file?
copy_file dest
when directory?
if !File.exist?(dest) and descendant_directory?(dest, path)
raise ArgumentError, "cannot copy directory %s to itself %s" % [path, dest]
end
begin
Dir.mkdir dest
rescue
raise unless File.directory?(dest)
end
when symlink?
File.symlink File.readlink(path()), dest
when chardev?, blockdev?
raise "cannot handle device file"
when socket?
begin
require 'socket'
rescue LoadError
raise "cannot handle socket"
else
raise "cannot handle socket" unless defined?(UNIXServer)
end
UNIXServer.new(dest).close
File.chmod lstat().mode, dest
when pipe?
raise "cannot handle FIFO" unless File.respond_to?(:mkfifo)
File.mkfifo dest, lstat().mode
when door?
raise "cannot handle door: #{path()}"
else
raise "unknown file type: #{path()}"
end
end
def copy_file(dest)
File.open(path()) do |s|
File.open(dest, 'wb', s.stat.mode) do |f|
IO.copy_stream(s, f)
end
end
end
def copy_metadata(path)
st = lstat()
if !st.symlink?
File.utime st.atime, st.mtime, path
end
mode = st.mode
begin
if st.symlink?
begin
File.lchown st.uid, st.gid, path
rescue NotImplementedError
end
else
File.chown st.uid, st.gid, path
end
rescue Errno::EPERM, Errno::EACCES
# clear setuid/setgid
mode &= 01777
end
if st.symlink?
begin
File.lchmod mode, path
rescue NotImplementedError, Errno::EOPNOTSUPP
end
else
File.chmod mode, path
end
end
def remove
if directory?
remove_dir1
else
remove_file
end
end
def remove_dir1
platform_support {
Dir.rmdir path().chomp(?/)
}
end
def remove_file
platform_support {
File.unlink path
}
end
def platform_support
return yield unless fu_windows?
first_time_p = true
begin
yield
rescue Errno::ENOENT
raise
rescue => err
if first_time_p
first_time_p = false
begin
File.chmod 0700, path() # Windows does not have symlink
retry
rescue SystemCallError
end
end
raise err
end
end
def preorder_traverse
stack = [self]
while ent = stack.pop
yield ent
stack.concat ent.entries.reverse if ent.directory?
end
end
alias traverse preorder_traverse
def postorder_traverse
if directory?
entries().each do |ent|
ent.postorder_traverse do |e|
yield e
end
end
end
ensure
yield self
end
def wrap_traverse(pre, post)
pre.call self
if directory?
entries.each do |ent|
ent.wrap_traverse pre, post
end
end
post.call self
end
private
@@fileutils_rb_have_lchmod = nil
def have_lchmod?
# This is not MT-safe, but it does not matter.
if @@fileutils_rb_have_lchmod == nil
@@fileutils_rb_have_lchmod = check_have_lchmod?
end
@@fileutils_rb_have_lchmod
end
def check_have_lchmod?
return false unless File.respond_to?(:lchmod)
File.lchmod 0
return true
rescue NotImplementedError
return false
end
@@fileutils_rb_have_lchown = nil
def have_lchown?
# This is not MT-safe, but it does not matter.
if @@fileutils_rb_have_lchown == nil
@@fileutils_rb_have_lchown = check_have_lchown?
end
@@fileutils_rb_have_lchown
end
def check_have_lchown?
return false unless File.respond_to?(:lchown)
File.lchown nil, nil
return true
rescue NotImplementedError
return false
end
def join(dir, base)
return File.path(dir) if not base or base == '.'
return File.path(base) if not dir or dir == '.'
begin
File.join(dir, base)
rescue EncodingError
if fu_windows?
File.join(dir.encode(::Encoding::UTF_8), base.encode(::Encoding::UTF_8))
else
raise
end
end
end
if File::ALT_SEPARATOR
DIRECTORY_TERM = "(?=[/#{Regexp.quote(File::ALT_SEPARATOR)}]|\\z)"
else
DIRECTORY_TERM = "(?=/|\\z)"
end
def descendant_directory?(descendant, ascendant)
if File::FNM_SYSCASE.nonzero?
File.expand_path(File.dirname(descendant)).casecmp(File.expand_path(ascendant)) == 0
else
File.expand_path(File.dirname(descendant)) == File.expand_path(ascendant)
end
end
end # class Entry_
def fu_list(arg) #:nodoc:
[arg].flatten.map {|path| File.path(path) }
end
private_module_function :fu_list
def fu_each_src_dest(src, dest) #:nodoc:
fu_each_src_dest0(src, dest) do |s, d|
raise ArgumentError, "same file: #{s} and #{d}" if fu_same?(s, d)
yield s, d
end
end
private_module_function :fu_each_src_dest
def fu_each_src_dest0(src, dest) #:nodoc:
if tmp = Array.try_convert(src)
tmp.each do |s|
s = File.path(s)
yield s, File.join(dest, File.basename(s))
end
else
src = File.path(src)
if File.directory?(dest)
yield src, File.join(dest, File.basename(src))
else
yield src, File.path(dest)
end
end
end
private_module_function :fu_each_src_dest0
def fu_same?(a, b) #:nodoc:
File.identical?(a, b)
end
private_module_function :fu_same?
def fu_output_message(msg) #:nodoc:
output = @fileutils_output if defined?(@fileutils_output)
output ||= $stdout
if defined?(@fileutils_label)
msg = @fileutils_label + msg
end
output.puts msg
end
private_module_function :fu_output_message
# This hash table holds command options.
OPT_TABLE = {} #:nodoc: internal use only
(private_instance_methods & methods(false)).inject(OPT_TABLE) {|tbl, name|
(tbl[name.to_s] = instance_method(name).parameters).map! {|t, n| n if t == :key}.compact!
tbl
}
public
# Returns an array of the string names of \FileUtils methods
# that accept one or more keyword arguments:
#
# FileUtils.commands.sort.take(3) # => ["cd", "chdir", "chmod"]
#
def self.commands
OPT_TABLE.keys
end
# Returns an array of the string keyword names:
#
# FileUtils.options.take(3) # => ["noop", "verbose", "force"]
#
def self.options
OPT_TABLE.values.flatten.uniq.map {|sym| sym.to_s }
end
# Returns +true+ if method +mid+ accepts the given option +opt+, +false+ otherwise;
# the arguments may be strings or symbols:
#
# FileUtils.have_option?(:chmod, :noop) # => true
# FileUtils.have_option?('chmod', 'secure') # => false
#
def self.have_option?(mid, opt)
li = OPT_TABLE[mid.to_s] or raise ArgumentError, "no such method: #{mid}"
li.include?(opt)
end
# Returns an array of the string keyword name for method +mid+;
# the argument may be a string or a symbol:
#
# FileUtils.options_of(:rm) # => ["force", "noop", "verbose"]
# FileUtils.options_of('mv') # => ["force", "noop", "verbose", "secure"]
#
def self.options_of(mid)
OPT_TABLE[mid.to_s].map {|sym| sym.to_s }
end
# Returns an array of the string method names of the methods
# that accept the given keyword option +opt+;
# the argument must be a symbol:
#
# FileUtils.collect_method(:preserve) # => ["cp", "copy", "cp_r", "install"]
#
def self.collect_method(opt)
OPT_TABLE.keys.select {|m| OPT_TABLE[m].include?(opt) }
end
private
LOW_METHODS = singleton_methods(false) - collect_method(:noop).map(&:intern) # :nodoc:
module LowMethods # :nodoc: internal use only
private
def _do_nothing(*)end
::FileUtils::LOW_METHODS.map {|name| alias_method name, :_do_nothing}
end
METHODS = singleton_methods() - [:private_module_function, # :nodoc:
:commands, :options, :have_option?, :options_of, :collect_method]
#
# This module has all methods of FileUtils module, but it outputs messages
# before acting. This equates to passing the :verbose flag to
# methods in FileUtils.
#
module Verbose
include FileUtils
names = ::FileUtils.collect_method(:verbose)
names.each do |name|
module_eval(<<-EOS, __FILE__, __LINE__ + 1)
def #{name}(*args, **options)
super(*args, **options, verbose: true)
end
EOS
end
private(*names)
extend self
class << self
public(*::FileUtils::METHODS)
end
end
#
# This module has all methods of FileUtils module, but never changes
# files/directories. This equates to passing the :noop flag
# to methods in FileUtils.
#
module NoWrite
include FileUtils
include LowMethods
names = ::FileUtils.collect_method(:noop)
names.each do |name|
module_eval(<<-EOS, __FILE__, __LINE__ + 1)
def #{name}(*args, **options)
super(*args, **options, noop: true)
end
EOS
end
private(*names)
extend self
class << self
public(*::FileUtils::METHODS)
end
end
#
# This module has all methods of FileUtils module, but never changes
# files/directories, with printing message before acting.
# This equates to passing the :noop and :verbose flag
# to methods in FileUtils.
#
module DryRun
include FileUtils
include LowMethods
names = ::FileUtils.collect_method(:noop)
names.each do |name|
module_eval(<<-EOS, __FILE__, __LINE__ + 1)
def #{name}(*args, **options)
super(*args, **options, noop: true, verbose: true)
end
EOS
end
private(*names)
extend self
class << self
public(*::FileUtils::METHODS)
end
end
end